Calculating machine



Jim. 14, 1941.

T. E. TORKELSQN CALCULATING MACHINE Filed June 9, 1937 14 Sheets-Sheet l ATTORNEY Jan. 14, 1941. 1-. E. TORKELSON CALCULATING momma 14 Sheets-Sheet ORNEY ATT Filed June 9, 1937 [III/III!/IIIIII/IIII/(i/I/II/IIIIII Jan. 14, 1941. "r. E. TORKELSON 2,223,330

CALCULATING MACHINE Filed June 9, 1937 14 Sheets-Sheet 3 FIG. 4.

FIGS.

|||| I INVENTOR 0W 8. OM/uLuw ATTORNEY 14, 1941- T. E. TORKELSON CALCULATING ACHINE Filed June 9, 1937 14 Sheets-Sheet 4 a an. x

Jan. 14, 1941. "r. E. TORKELSON CALCULATING MACHINE Filed June 9, 1937 14 Sheets-Sheet 5 las INVENTOR I F2 00M i. Unlula ATTORNEY Jan. 14, 1941. "r. E. TORKELSON CALCULATING MACHINE F iled June 9, 1957 14 Sheets-Sheet 6 I UNITS E I FlG.6b.

9. w. KW ATTORNEY Jan. 14, 1941. T. E. TORKELSON 2,228,330

CALCULATING MACHINE Filed June 9, 1937 14 Sheets-Sheet 7 "GMC INVENTOR' 49m 2. UM,

QgrUT. W

ORNEY T. E. TORKELSON 2,228,330

CALCULATING MACHINE Jan. 14, 1941.

Filed June 9, 1937 14 Sheets-Sheet 8 7')PBfi/?$ rr r anks czc--v--- "F199 I I I C MC MP PRODUCT SUM 6795064I7 87 9e 0 0 0 000 0 0 0 0 o 0 o 0 o o 0 0 000 444444044 4444 44 44 4444 5 5 505 5 5-5 5 5555 .5 505 55 55 065660666 6660 6666 6066 707777770 7077 7777 7777 333 5383s a 088 a 0886 8888 9 30399 9 99 9509 99 39 9 s9 9 1 c2 1 INVENTOR 6/ 63 ATTORN EY 91AM E. 001141141 Jali- 1941- I T. E. TORKELSON I 2,228,330

CALCULATING MACHINE I Filed June 9, 1937 14 Sheets-Sheet 9 FIG. 10.

INVENTOR W 6. Goduiuu BY U-W ATTORNEY Jan. 14, 1941. 11 TQRKELSQN 2,228,330

CALCULATING MACHINE Filed June 9, 1937 14 Sheets-Sheet 10 FIG. 11.

' INVENTOR 95' Y C. 901M414.

ATTORN EY Jan. 14, 1941.

Filed June 9, 1937 14 Sheets-Sheet ll 5 M 9 Q a 3 9 O 6/ a 1 4 1 s b 6 o 9 3 8 7 l 8 a a 0 9 m 9 F 9 B 9 8 7) 8 B (B I M B 4 L Z HQ 3 m M B M I l 2 m 6 6 m 1 4 I 9 9 o D a 1 n z E a H 4 a nu m 5 E l 6 7| H 7 I. H a E 9 H 0 M u u z E 3 l E 4 E 5 E s S H 6 1 0H 7 6 9H 9 H h Q INVENTOR 001M 6. 0m,

ATTORNEY CALCULATING MACHINE Filed June 9, 1937 14 Sheets-Sheet'lZ 0 I 7 96 i 9 8 7 6 5 4 3 1! 1 0 9 6 7 6 5 4 T I i l HL- 1-L J 69 14 W1 H I x HEIIIHEEIHE EEIHHEEEHEIIE 4 135' 142 o: A 143 1 (A 141 A2 I A 143 .p Mk var INVENTOR 001M i. aodujuu,

ATTORNEY 1941- T. E. TORKELS ON CALCULATING momma 14 Sheets-Sheet 13 Filed June 9, 1957 5 a 0 a 9 w a: 4 vi 5 6 b 9 a m a w s 8 B 5 41 B 2 B B C FL 30%|... a B W. m m E! 59 E] H H B 5 HE] E II I! INVENTOR 9011111. 6. m uluu BY ATTORNEY FIG.19

T. E. TORKELSON 2,228,330

CALCULATING MACHINE Filed June 9, 1957 '14 Sheets-Sheet 14 7 W 7! m C \IU W .0 a 2 6 2 2 1 w G 89 483 5 w F 7 8 m P W L s 2 m G I F Jan. 14, 1941.

4- 2 3 .6 INVENTOR ATTORNEY u/wrs TEA/.5

Patented Jan. 14, 1941 UNITED STATES PATENT OFFICE 2,228,330 CALCULATING MACHINE Application June-9, 1937, Serial No. 147,222

10 Claims.

This invention relates to calculating machines and more particularly to machines controlled by perforated record cards.

One of the objects is to devise means for performing adding operations in a minimum number of cycles.

Another object is to devise means whereby a differential storage device may be employed and in which a plurality of amounts to be added may be entered into as manysections of the differential mechanism as there are units of value in the amounts and the total of all these amounts may be read out directly in a single operation.

A further object is to provide multiplying mechanism inwhich twofactors may be entered and the several partial products derived may then be entered into the differential storage device from which the product can be directly read out in a single operation.

A still further object is to provide a novel adding mechanism which includes a separate section for each separate unit of value to be added and improved tens carry devices arranged to effect a carrying operation immediately upon the entry ,of a number of unit values which aggregate ten or more.

The machine comprises a card' handling section in which record cards are successively moved to pass a sensing station. As each card passes thestation, two or more amounts may be read therefrom and entered into the calculating devices which, when the card has advanced to a punching station, will punch the total of the amounts or their cross sum back into the record card. I

In accordance with another use of the machine, the sensing station may sense two factors and enter the same into multiplying mechanism which, in turn, will enter derived partial products into the adding devices and these, in turn, will punch back the product in the record card when (Cl. ass-61.6)-

ments adjust contact devices to represent the digits entered therein. After a group of elements has been displaced, an emitter sends a series of impulses representing the digits to each section concurrently and the contact devices set up in each section will provide a circuit path for the digit impulses representing the sum of the digits entered in the section.

Further objects of the instant invention reside in any novel feature of construction or operation or novel combination of parts present in the embodiment of the invention described and shown in the accompanying drawings.

In the drawings:

Fig. 1 is a sectional view of the machine showing the location of the various units and the driving mechanism thereto.

Fig. 2 is a section through the adding mechanism showing one of the entry receiving elements. 20

Fig. 2a is a detail of a further slide.

Fig. 3 is a section taken on lines if? in Fig. 2.

Fig. 4 is a section of the multiplier and multiplicand entry receiving device.

Fig. 5 is a section taken on line 5-5 of Fig. 4.

Figs. 6, 6a, 6b, and 6c, taken together, constitute the wiring diagram of the electric circuits of the machine.

Fig. 6d shows the relationshipiof the drawings containing Figs. 6, 6a., 6b, and 60, required to constitute the complete circuit arrangement.

Fig. 7 is a timing diagram of the machine when used for adding operations only.

Fig. 8 is a timing diagram of the electric circuits of the machine when used for multiplying operations.

Fig. 9 is a record card showing the arrangement of the several fields to be sensed and punched. A

Fig. 10 is a view at an enlarged scale of one of the adding sections showing the manner in which the circuits are traced through the several orders.

Figs. 11 to 1'7, inclusive, illustrate a section of the adding mechanism in various positions.

Fig. 18 is a detail of contact operating devices.

Fig. 19 is a section of a multiplying commutator.

Fig. 20 is a diagram of a multiplying problem.

Fig. 21 is a portion of the circuit diagram to explain the principle of the multiplying operation.

Gard feeding and sensing mechanism The-several units of the machine will first be described to point out their manner of organization, after which the operation of the complete machine will be set forth in connection with the circuit diagram, at which time the coordination of the various units will be set forth. The main drive shaft of the machine is indicated at in Fig. 1 and may be driven by any suitable source of power to maintain it in constant rotation. The shaft l0 carries a gear 2| which meshes with and drives a gear "freely mounted on the card feed shaft F. Secured to gear is a clutch driving element I 9 which is consequently in constant motion. Lying in the plane of clutch element 19 is a spring-pressed dog I 8 which is carried by and pivoted to a cam 22. An armature latch I! normally holds the pawl 18 out of engagement with the driving element is. Upon energization of magnet 15, latch I1 is rocked counterclockwise to release pawl I8 whereupon a spring will move it into engagement with the driving element I! to cause rotation of cam 22.

The cam 22 is secured to shaft F so that the shaft will rotate in unison with the driving element l9. Cam 22, as it rotates, will rock a bell crank follower lever 23 and, through a link 24, oscillate arms 25 which have pin and slot connection with a card picker which is suitably mounted for vertical reciprocation. The downward movement of picker 28 will advance a card 0 from the feed magazine 21 to the uppermost pair of feed rollers 2| which continue the downward movement of the card to further pairs of feed rollers 28. The several pairs of feed rollers are interconnected by gears generally designated 29 and are driven by a suitable gear secured to the shaft F so that the rollers 28 are in motion during the rotation of shaft F.

The record cards C (see Fig. 9) are placed in the magazine 21 so that the zero index point positions lead and the cards will pass the sensing station comprising individual sensing brushes 30 and common contact roller 3| in the order 0, 1, 2, 3 7, 8, 9. For each revolution of shaft F, a record card will be advanced from the hopper to a position shown in Fig. 1 in which the card isinpositionwiththebrushes ll abouttosense the zero index point positions. During the secand cycle of shaft F, the card is advanced to the pimching station which comprises a plurality of rows of punches is spaced in accordand: with the arrangement of the index point positions on the record card. A gate 11 stops the leading edge of the card and holds the same in position until punching has been effected. The gate 11 is connected by a link ll to a bell crank cam follower 19 whose roller cooperates with a. cam I. secured to shaft F.

As the cards advance toward the sensing posi tion, they will engage and rock a pivoted card lever 32 which will cause closure of card lever contacts designated CLC.

Printing and punching mechanism The printing and punching devices are operated from a shaft designated P upon which is freely mounted a gear 2|a to which is secured clutch driving element 2.. Cooperating with element, Ills a spring-pressed pawl Ilwhich is carried by a cam 2. Supported by and pivoted to the cam i2 is an armature latch 3' which normally holds the pawl 31 out of engagement with driving element 28. Energization of clutch magnet 35 will cause the latch 26 to release pawl 21 for engagement with driving element 20 whereupon shaft P. to which cam 42 is secured. will rotate. Secured to shaft P is a cam 39 which cooperates with a follower lever 40 whose upper extremity is connected through arm and link connection 53 to a shaft 54. Upon the shaft 54, at each end thereof is secured an arm 55a supporting a bail 55 which extends across the upper edges of a plurality of sliders 56. Sliders 55 are suitably mounted for vertical reciprocation and are normally urged upward by their springs 56a. The lower extremity of each slider carries a resiliently mounted interposer 51 which will pass the punches 58 in the related column in order. As the slider 56 moves upwardly, notches 59 will pass the nose of a pawl 60 in succession. During the upward movement of the slider, energization of punch selecting magnet 6| will attract its armature Gla and release pawl 60 for engagement in one of the notches 59. The notch engaged will depend upon the time of operation of magnet Bl After the sliders 56 have been positioned, punch plate 65, which is mounted for horizontal reciprocation, will be moved toward the left to force the positioned lnterposers 51 against the selected punches 58 and force the same through the record card. The plate has connected to it a link 64 whose other end is connected to a bell crank follower 83 which is operated by the cam 62 on shaft P.

Secured to the shaft 4| are arms 42 between the extremities of which extends a bar 43. Bar 43 controls positioning of type carriers which carry type elements 45 past printing position opposite platen 46. As the type carriers 44 move upwardly, notches 41 pass the nose of stopping pawl 48 in succession. Duringsuch movement, energization of print selecting magnet 49 will attract lts armature 49a to trip pawl 48 into engagement with one of the notches 41, the notch selected depending upon the time of energlzation of magnet 49. As will be explained in connection with the circuit diagram, the mob selecting magnet 84 and the print selecting magnet 49 will be concurrently energized through Parallel circuits and the digit punched will correspond to the digit printed. Where nothing is to be psmched in a card column, the men slider moves to its extreme position with the interposer 5'! advanced beyond the uppermost plmch 44. Similarly, where a type bar 44 is not positioned for printing a digit, the lowermost type element will advance beyond the printing position. For each type carrier there is provided a. pivoted hammer 52 normally latched in the position shown by a latch 20. across the latches is a bail 5| pivoted at la and having arm and link connection 5| to the arm 42 at a. point on the arm between shaft 4| and rod 43. The

proportion ofthepartsissuchthatasthearm 42 moves clockwise, bail II will move in the some direction and near the extremity of the movement of arm 42, the bail will rock latches I20 clockwise to release the hammers 52.

Adding slide unit In Fig. 1, the gear 240, through an idler 4|, drives a gear 42 which is freely motmted on shaft AS. Secured to gear 22 is clutch driving element 18 which. 'by virtue of the gear connection to the main drive shaft II, is in constant rotation. 00- operating with element II is a spring-Md pawl '4 which is pivoted to, and carried by, comdriving element 89 and when so engaged, shaft AS will rotate. Connected to the pawl 84, through a curved link 86.15 a dog 81 which lies in the path of armature latch 86 and when engaged by the latch will disengage the clutch, after it has made a half revolution.

Under certain conditions of operation, it is desired to have the shaft make a complete revolution, in which case the magnet I6 is held energized until the dog 81 has passed beyond the latching point of armature latch 95. Associated with the armature latch 86 is a pair of contacts 88 which close when the latch 86 is attracted by the'magnet 16.

The cam I5 cooperates with a follower arm I4 secured to a shaft I3 upon which are secured arms 12 which have pin and notch connection with a bar II (see also Fig. 2). As the bar II moves toward the left (Fig. 2), adding slides 69 will follow under the influence'of their springs I9. Each slide 69 is provided with a plurality of notches 68 which pass the toe of a pawl 61 in the order 0, 1, 2, 3 'I. 8, 9. as the correspondingly numbered index point. positions of the record card pass the sensing brushes 99. Latch 61 is normally held out of cooperation with the notches by armature latch 66a which releases the pawl 61 for engagement with the notches 68 upon energization of magnet 66. Carried by each slide 69 is a group of contact plungers 89 which are insulated from one another and from the slide. In line with.the contact plungers 99 for each column there is a line of contact segments 99 over which the contacts 89 slide as the slide 69 reciprocates. If the record column sensed contains a perforation in the 0" position, the pawl 61 will be tripped to engage the 0 notch 68 and thecontact 89 farthest to'the' right will be in position over the right hand 0 segment 99. If the column contained a perforation in the 1" position, the

' pawl 61 would engage the 1 notch 69 and the contact 89 farthest to the right would be in position over the right hand segment 99 designated i. Thus, for any digit entered on the slide 69, the right hand contact 89 will take a position over the corresponding right hand segment 99.

Each group of segments 99 associated with a bar 69 is carried by an insulating member 9| which is mounted for horizontal movement and has an extending portion 92 provided with a notch in which the toe of the pawl 93 is normally in engagement, holding the member 9| in the position shown in Fig. 2 agai st the tension of its operating spring. A magnet 96, upon energization, will rock pawl 99 out of engage ment with the notch in extension 92 so that spring 94 will move member 9| toward the right a distance equal to the space between two adjacent segments 99. v

The magnet 95 is energized whenever a unit is to be carried into the related order, as will be explained in connection with the circuit diagram, and this displacement toward the right of member 9|, in effect, causes an advance of one step by the slide 99 with respect to the memher and its contacts 99.\ Abutting the end of extension 92 is the blade of a pair of contacts 95a which close when the member 9| moves toward the right. In line with slide "is a pair of cor;- tacts 96 which are normally held open by a lateralextension of the slide and which close when the slide has moved toward the left a distance equal to one and a half times the spacing between two adjacent segments 99; that is, when the right hand contact 89 has moved to a po- 9 sition half way between the right hand segments 99 designated 0" and "1. Between the slide 69 and its companion. slide 9| is a pivoted lever 91 whose upper arm is engaged by a pin 98 in slide 69 when the slide is restored toward the right to rock the lever clockwise and by engagement with the pin 99 in extension 92 will restore the member 9| to its latched position.

In Fig. 2a is shown a slide 69a which is positioned in exactly the same manner as the slide 69 of Fig. 2. This slide carries three contact plungers designated 89a and one designated 89b. The three contacts 89a are electrically connected to one another and are insulated from the single contact 89b. The contacts cooperate with a iixed member 9|a of insulating material in which a single set of contact segments 99 is embedded. In restored position, the contact 99b occupiesthe position as shown and advances toward the left to engage the segments 99a in order as the correspondingly numbered index point positions of the card pass the sensing station. Sensing of a perforation in a related card column. will interrupt the slide 69a with the contact 89b in position over the segment 99a corresponding to the value of the perforation.

The machine is provided with a number of slides 69 with cooperating members 9| and also a number of slides 69a with cooperating members 9|a. The manner in which the units are grouped to form what will be termed an adding section will be more fully explained in connection with the circuit diagram.

Factor slides is clutch driving element I92 with which springpressed pawl I99 carriedby cam I96 cooperates. The pawl I99 is normally held out of engagement with the driving element I92 by the armature latch I96. Energi zation of magnet I96 will release pawl I99 and shaft FS will consequently rotate. Cooperating with cam I94 is a follower arm I 9'I secured to shaft I98 to which are see cured arms I99 which have pin and notch connection with a bar IIII (see also Fig. 4). As the bar I I9 moves toward the left. as viewed in Fig. 4. slides II I. will follow under the influence of their of stopping pawl Ill as the correspondingly numbered index point positions of a record card pass the sensing brushes 39. The pawl H4 is normally latched out of cooperation with the notches 3 by armature latch -I I5 which is controlled by the magnet H6.

The magnets II6 are energized in response to the sensing of a multiplicand or a multiplier facsprings H2 and notches II3 will pass the toe tor and control displacement of the slides III accordingly. Carried by the slides III which are positioned in accordance with the multiplier fac tor are eight contact plungers II I (see Fig. 5) of which four are mounted on each side of the slide and the slides III associated with the multiplicand factor carry four contact plungers III of which two are locatedoneach side of the will he more fully enplained in connection with the circuit diagram.

controlled contacts In the machine are provided several cam op erated contacts whose timing is designated in Figs. 7 and 8. Thus, contacts which are controlled by cams on the card feed shaft F are designated with the prefix F, those carried by shaft P are designated with the prefix P, and the. cam contacts prefixed AS are on the shaft AS. Also carried by the shaft P is an emitter designated El (Fig. 18) which comprises a stationary commutator with ten contact segments II 9 and a brush I20 carried by an arm secured to shaft P. Mounted on shaft AS (see also Figs. 18 and 19) are multiplying brushes I2I which cooperate with two sets of fixed contact segments I22 and I23. For each set of segments I22 and I23 there is a collector segment designated I22a and I23a respectively which are wired as shown on the circuit diagram.

As explained above, the shaft AS is driven through a half-revolution clutch and during multiplying operations the shaft makes a half revolution for each record card so that the brushes I2I advance 180 degrees for each operation as will be explained.

C'ircuitdiagram The operation of the machine in which a plurality of amounts of a record card are cross added and the sum thereof punched back in the card 45 will first be described In Fig. 9, the record card C has three fields designated CI, C2, and C3 in which perforations representing the amounts 619, 508, and 1 are punched. The amounts in these three fields are to be added together and 50 the sum punched back in field C4. Referring to Fig. 6, the sensing brushes which traverse the three amount fields CI, C2, and C3 are wired to plug sockets I24 and the punch selecting magnets GI which control punching of the field Cl are 55 wired to plug sockets I25. The sockets I24 are connected through plug connections I28 to plug sockets I21 as indicated, with the units digits of the three amounts connected to three adjacent slide controlling magnets 6 6, the tens digits 50 connected to the next three lower magnets 68, and the hundreds digits to the following group of three slide controlling magnets 66.

Each set of three magnets 66 and associated mechanism constitutes what will hereinafter be termed a section of the adding mechanism. Each section includes two slides 89 and a slide 69a arranged and wired together as shown in Fig. 6. Thus, for -a machine having a capacity to add together three 3-place numbers, there will be four sections and each section will have two slides 69 and one slide 69a. For greater capacity, additional slides 69 are included in each section and there will be only one slide 69a in any case.

The plug sockets I25 are connected through 75 plug connections I28 to sockets I29 which are -(see Fig. '7) and connected to the print controlling magnets 49 for operation of the print magnets concurrently with the punch magnets. From sockets I29 plug connections I30 extend to sockets I3I so that the magnets #9 and BI which control the printing and punching of the units digit of the sum are connected to the socket I3I associated with the units section of the adding mechanism. The magnets 49 and BI which control the printing and punching of the tens digit of the sum are connected to the socket l3I associated with the tens section of the adding mechanism and so on. A group of sockets 200 is provided which is connected to contacts A83. From these sockets connections 20I are made to sockets I21 of magnets 56 which are not connected to sensing brushes and which are associated with an overflow adding section. Contacts AS3 are timed (Fig. 7) to complete circuits to stop the connected slides in position as will be explained.

With the plug connections made as indicated and with cards placed in the supply magazine 27, the machine is ready to commence operation. As a. preliminary, the Add key is operated to open a pair of contacts I32 (bottom of Fig. 6a) to deenergize relay magnet T if the relay is in energized condition due to possible previous multiplying operations during which the relay may have been energized, as will be explained. Thus, at the start, relay magnet T is deenergized and its several contacts 'II-TI are in the positions shown on the diagram.

Depression of the start; key II will clue contacts l2 to complete a circuit from negative side of line I3 through contacts I2, motor control relay R. to left side of the line I4. Relay R will close its contacts R2 establishing a holding circult through the cam contacts P--2 and will also close its contacts Rl to complete the circuit through the motor M. This places the shaft III of Fig. 1 in operation. Operation of start key II will also close a pair of contacts I which complete a circuit from line I3, contacts I5, card feed clutch magnet I6, to line ll. Energization of magnet I6 will couple the card feed shaft F for rotation and this shaft will now turn to cause advance of the first card from the supply magazine. The cycle thus initiated is an idle cycle, required to advance the first card into the machine.

The contacts I2 are held closed until the first card has advanced far enough to cause closure of card lever contacts CLC which takes place at about the 12" time in this preliminary cycle at which time a further holding circuit for the motor control relay R is completed through the stop key contacts 34 and the card lever contacts CLC. During this cycle, the F cams operate and toward the end of the cycle, contacts Fl close after contacts CLC have closed, to complete a circuit from line I3. contacts CLC. wire 33, contacts FI, relay contacts T4, print clutch magnet 35, to line I4. The shaft P is now coupled for operation and will make one cycle, which is an idle cycle, at this time, since no card is in position to be punched and no entries as yet have been made in the adding mechanism. The first card at this time is in the position indicated 'in Fig. 1 with the 0 index point positions ready to pass the sensing brushes. Near the middle of the revolution of the shaft P, contacts PI close, completing a circuit from line I3, contacts CLC, wire 33, contacts P3, contacts T6, through the adding slide clutch magnet 16 to line I4. As explained, energization of clutch I8 will cause closure of contacts 33 which will provide a holding circuit from line I4, through magnet I3, contacts T3, contacts 33, cam contacts F4, wire 33, contacts CLC" to line I3. This circuit will be maintained until the dog 31 (Fig. 1) has passed the half revolution declutching position so that the shaft AS will make a complete revolution, first restoring the slides during the first half revolution of shaft AS which is concurrent with the second half revolution of shaft P.

Near the end of the print cycle, cam contacts PI close, energizing the feed clutch magnet I3 and shaft, F enters upon another cycle of operations to advance the card past the sensing brushes 33. his cycle of shaft F is exactly the same as the preliminary idle cycle except that the card lever contacts CLO are now closed throughout. the period indicated in shaded outline'in Fig. 7 to about the 5 time in the cycle. Just at this time, contacts F2 close to bridge, the contacts CLC which, if 'a second card follows, again close at about 12. Thus, during the second card feed cycle (the first effective cycle) current is supplied throughout the entire cycle from line I3 (Fig. 6a) to wire 33 through either contacts CLC or F2 and this connection will continue as long as cards continue to feed in succession, past the sensing brushes. During this passage of the card by the brushes 33, the adding slides are movedin synchronism with the card, this movement taking place during the second half of the revolution of the shaft AS. After the slides have taken a position under control of the perforations sensed they will remain in setup position while the card feed shaft completes its cycle, during which it advances the card into punching position. At this point, the slides are differentially positioned in accordance with the amounts sensed in the fields CI, C2, and C3 of the card C. A representative entering circuit may be traced as follows: from line I3 (Fig. 6a), "contacts CLC or F2, wire 33, circuit breaker contacts F3, wire I33 (Fig. 6), common contact roll 3|, perforation in the record card, corresponding brush 33, plug socket I24, plug connection I25, socket I21, slide positioning magnet 63, wire I34, to line I4. The circuits through the magnets 66 will, of course, be completed at differential times in accordance with the location of the perforations in the card columns and the movement of the slides 33 and 63a toward the left will be interrupted at differential times accordingly.

In the overflow adding section circuits are completed from line I3, contacts CLC or F2, wire Tens carry circuits Provision made for carrying from the units section of the adding mechanism to the tens section, from the tens section to the hundreds section, and so on, whenever the sum of the digits entered into any one section aggregates 10 or more. magnets 35 are omitted since no carrying is effected into this section. For each of the sections higher than the units, there is provided a relay In the units section (Fig. 6) the carry magnet A which, through circuits to be traced in more detail hereinafter, will be energized whenever the sum of the digits entered in the next lower order aggregates 10 or a multiple of 10. The circuit for energizing relay A extends to wire I35 from line I4, through series circuits which will be traced later, thence through relay A, through its contacts AI, the upper carry magnet 35 to wire I35 (Fig. 6a) contacts P5, wire 33, contacts CLC or F2, to line I3. Energization of carry magnet 35 will release the related slide 3| for movement toward the right and, in effect, adding one unit to the setting thereof. Relay magnet A is adjusted to open its con-tacts Al to break the circuit to magnet 35 after it has been energized, but before the contacts 35a operated by the related slide close. Opening of contacts AI is accompanied by closure of contacts A2 which set,

up a holding circuit from wire I35 through relay magnet A, contacts A2, wire I35, to line I3, as before. This circuit, as will be explained later, is held momentarily as the slides of the section pass through 10 and the circuit is broken when 10 has been passed so that contacts AI again close and contacts A2 open.

If the slides in their continued advance now aggregate 20, a circuit is again established between line I4 and wire I35 energizing magnet A a second time and continuing the circuit through contacts AI, contacts 35a, which were closed previously, and the second carry magnet to cause Referring first to Fig. 10, the interconnecting 1 wiring between the several orders of a section will first be explained. The three contact plungers 33a are connected through a wire I31 to contact points BI and through these contacts to line I4. The other contact plunger 3312 on the slide 33a is connected through a wire I33 and normally closed contacts B2 to line I4. The contact se ments 3311 are connected through flexible wires I33 to the contact plungers 33 of the next slide 53, the connections being made in the order shown. The segments 33 of the intermediate order are connected through wires I43 to the contact plungers 33 of the lowermost slide 63.

Through the wires I43, the like-numbered segments 33 are both connected to the same con-- tact plunger 33. Finally, the segments 33 of the last order are connected to a group of wires I4I which, through the contacts DI of the multicontact relay D; may be connected to the lines I42 extending to contact segments II3 of the. emitter El. The 0" wire I has a lead I 43 extending to the two contacts 33 in parallel as shown. With the machine at rest, the slides, the contacts, and the circuit connections are in the relationship shown in Figs. 6 and 60.

As the card traverses the sensing brushes, the slides 63 move in synchronism therewith. In

'Fig. 11 is shown'the relative positions of the parts/when the "5 index point position of the card has reached the brushes 33 and it is assumed that the column connected to the lowermost slide 33 containsa zero so that this slide was stopped at zerowhile the other two continued their advance.- At the "5 position, the

aggregate amount. standing on the three slides is 10 and it is at this point, as the two uppermost slides pass through the 5 position, that a carry circuit is completed to the next higher order section of the adding mechanism. The circuit which is completed at this instant is accented in heavy dotted lines in Fig. 11 and is traceable as follows: from line I4 to contacts B2, wire I 38, contact 89b, the 5 segment 90o, wire I39 running from the 5 segment a to the fifth contact 89 from the left of the second slide 69 through 0 segment 90 of the central slide, the connected wire I40 to the right hand contact 89 on the lowermost slide, thence through the 0 segment 90 of this slide, the 0 wire Ml, the lead I43, the upper contact 98, which is closed due to the advance of its slide beyond 0 position, wire I35, and thence through relay A and carry magnet of the next higher order to wire I35 and line l3, as explained above.

In Fig. 12 is shown the path through which a carry circuit is completed when all three slides 69 are passing through the 4 position without having been interrupted. At this point the carry circuit is completed as again emphasized by a heavy dotted line with the circuit extending from line I4, contacts BI, wire H", the central contact 89a on slide I59, and thence in series through the indicated wires I39, I30 and lead I43 through the contacts 96 and wire I35 to the relay A. If the three slides should be interrupted at this point, the circuit will continue to hold relay magnet A energized through the holding circuit extending from wire I35, relay magnet A, contacts A2, wire I38, thus holding contacts AI open so that only the single carry operation can be effected.

.As the slides 69 continue uninterruptedly from the position in Fig. 12 to that in Figs. 13 and '14 in succession, that is, as they all pass through the 5 and 6 positions, there will be no further carry circuits completed. As the slides reach the position of Fig. 15 where all three are at 7, a second carry circuit is immediately completed, this circuit being indicated by the heavy dotted line and is traceable from line I 4, through contact BI, wire I31, the left hand contact 89a, the 6 segment 90a, wires I 33 and I, as indicated, lead 3, contacts 9, wire I35, relay A, contacts AI, the first pair of contacts Il which were closed as a result of the first carry, and thence to the second carry magnet 35 and wire I36 to line H3. The magnet II causes shifting of another slide II of the next higher order adding section, contacts AI again breaking before the second pair of contacts 35a close so that only the one magnet 35 is energized.

In Fig. 16 is shown the circuit path for completion of a second carry at the time the positions of the three slides represent ll. In this position, the upper slides have been stopped at 6 while the lowermost slide is at the 8" position, either stopped there or passing through. The circuit is emphasized and it is quite apparent without detailed tracing of the same.

In Fig. 17 is shown the path through which the carry circuit is completed where the section has already received a carry impulse and this added "one combined with the setting of the bars aggregates 10. Thus, in Fig. 1'1. the lowermost slide is stopped at 0"; the central slide has stopped at 4, but its companion slide II has been moved one step toward the right so that, in effect, there is a 5" in the central slide; and

the uppermost slide is stopped at or passing through the "5 position. Here, again, the carry circuit is emphasized and extends through the contact 89b, the series connections through wires I39, I40, and HI to lead I43 and the upper contacts 33 to the wire I35 and the appropriate carry magnet 95 of the next higher order.

It is thus seen. that the carry circuit may follow through various circuit paths depending on the relative positions of the slides and the circuit may go through contact 39b or one of the contacts 380. Whenever the aggregate setting of the slides is exactly 10, the circuit will go through contact 8317. In certain cases, for example, that shown in Fig. 12, where the three bars advance together, they move from a position in which they aggregate 9 when all three are set at 3 to a position where they all aggregate 12 where all bars are set at "4 and no carry circuit is completed until they are all at the "12 position If one oi these slides had been stopped at the "2 position, then when the other two arrived at 4, the aggregate would have been exactly 10 and the carry circuit traceable through contact 89b. These carry operations all take place as the card moves past the sensing station Y and at the end of the card feed cycle, each section 4 of the adding mechanism will be in readiness to have the total read out immediately. At the end of the card feed cycle, the slides will be in their forward position with the setting where they will remain until they are restored in the second half of the following printing and punching cycle.

Total printing and punching Near the end of the card feed cycle, cam contacts Fl close, again energizing the print clutch magnet 35 so that a revolution of shaft P is initiated'. Cam contacts P4 close just as the cycle commences and cause energization of relay mag net B through a circuit from line I4, relay magnet B (Fig. 6a), contacts P4, wire 33 contacts CLC, to line I3. The magnet B remains energized throughout the print and punch selecting portion of the cycle and, during such period, it holds open its contacts BI and B2, the former cutting on the carry circuit connections to the contacts "a, and the latter opening the carry connection to contacts l9b-which are now connected to the plug socket I3I through closure of contacts B3. At the same time, contacts P5, controlled by the same cm as contact P4, open the common carry line I36. In parallel with relay B are a plurality of relay magnets D, each of which controls a group of contacts DI (see also Fig. 10) which are placed in the wires Ill. These contacts are open during entering operations to prevent possible back circults and are closed to connect the wires Ill to the wires I42 so that the total may be read out. As emitter brush III rotates with shaft P, It contacts the segments II! in succession in the order 0,1,2,3...'I,8,9Insynchronismwiththe movement of the type elements I! post the printing position in the same order and in synchrpniam with the movement or the punch inter'pooerc 31 past the punches II in the same order. Thus, each 01' the wires I" will be connected in turn to wire 33 and through contacts 61.0 to line II. The readout circuits may best be explained by tracing several specific examples.

In Fig. 10. the slides of the units section are shown as being set to represent the three digits "3," 3, and 1" whose sum is "7." When the brush I 20 arrives at the 7" segment III, a cir- 

